#fundamentals
8 notes, from beginner to advanced.
- Airflow Core Concepts: DAGs, Tasks, Operators and Runsapache-airflow · beginner · 2 min
- Lazy Evaluation: Transformations vs Actions in Sparkapache-spark · beginner · 2 min
- Normalization in Plain English: 1NF, 2NF, 3NFdata-modeling · beginner · 2 min
- NULL in SQL: The Rules That Break Queriessql · beginner · 2 min
- OLTP vs OLAP: Why Analytics Needs a Different Databasedata-warehousing · beginner · 2 min
- PySpark DataFrame Basics in 10 Operationspyspark · beginner · 2 min
- Tokens, Context Windows and Samplinggenerative-ai · beginner · 2 min
- SQL Logical Query Order: Why WHERE Can't See Your Aliassql · beginner · 4 min